US20030045398A1 - Transmission between a motor member and a drive shaft and engine motor provided with such a transmission - Google Patents

Transmission between a motor member and a drive shaft and engine motor provided with such a transmission Download PDF

Info

Publication number
US20030045398A1
US20030045398A1 US10/229,071 US22907102A US2003045398A1 US 20030045398 A1 US20030045398 A1 US 20030045398A1 US 22907102 A US22907102 A US 22907102A US 2003045398 A1 US2003045398 A1 US 2003045398A1
Authority
US
United States
Prior art keywords
engine
transmission
driven element
drive shaft
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US10/229,071
Other versions
US6789441B2 (en
Inventor
Robert Blanchard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Reducteurs SA
Original Assignee
France Reducteurs SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by France Reducteurs SA filed Critical France Reducteurs SA
Assigned to FRANCE REDUCTEURS reassignment FRANCE REDUCTEURS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLANCHARD, ROBERT
Publication of US20030045398A1 publication Critical patent/US20030045398A1/en
Application granted granted Critical
Publication of US6789441B2 publication Critical patent/US6789441B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D51/00Motor vehicles characterised by the driver not being seated
    • B62D51/001Motor vehicles characterised by the driver not being seated characterised by the vehicle control device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/04Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/02Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/19Gearing
    • Y10T74/19219Interchangeably locked
    • Y10T74/19377Slidable keys or clutches
    • Y10T74/19414Single clutch shaft
    • Y10T74/19419Progressive
    • Y10T74/19442Single key
    • Y10T74/19451Spur gears
    • Y10T74/1946Sliding clutch carrier
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/19Gearing
    • Y10T74/19219Interchangeably locked
    • Y10T74/19377Slidable keys or clutches
    • Y10T74/19414Single clutch shaft
    • Y10T74/19419Progressive
    • Y10T74/19442Single key
    • Y10T74/19451Spur gears
    • Y10T74/19465Sliding clutch operator

Definitions

  • the present invention relates to a transmission between a motor member and a drive shaft of an automotive tractor engine with an accompanying driver walking behind the engine, this driver acting on the steering member of the engine, such as a handlebar, as well as a driving engine provided with such a transmission.
  • a transmission of the type comprising, in a housing, a friction clutch constituted by at least one rotating drive element and at least one driven element carried by the drive output shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with variable engagement to obtain a variation of the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device projecting at least partially from the housing.
  • An object of the present invention is to provide a transmission of the mentioned type whose design permits incorporating a control device permitting a variation of speed of the engine whilst permitting the driver to control automatically the speed of the engine by automatically controlling the speed change arising from terrain of varied profile such as rising and falling.
  • Another object of the present invention is to provide a transmission of simple design at a reasonable cost.
  • the invention has for its object a transmission between a drive member and a drive shaft of an automotive tractor engine with a driver walking behind the engine, this driver acting on a steering member for the engine, such as handlebars, the transmission comprising, in a housing, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element carried by the output drive shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with a variable grip to obtain a variation in the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device that at least partially projects from the housing, characterized in that the control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine, tending to bring together the driving and driven element to increase the couple transmitted when the resistance to forward movement of the engine increases, the other, generated by the mass of the engine relieved by the driver, tending to uncouple the driving and driven element to reduce the couple transmitted
  • the invention also has for its object a driven tractor engine with an accompanying driver, the driver walking behind the engine acting on a steering member for the engine such as handlebars, this driving engine incorporating between a motor member and a drive shaft a transmission, the transmission comprising, in a housing, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element carried by the drive output shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with a variable grip to obtain the variation of the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device at least partially projecting from the housing, characterized in that the transmission is of the mentioned type.
  • FIG. 1 is a side view of a transmission according to the invention in an engaged position corresponding to a maximum transmitted couple of the engine;
  • FIG. 2 shows a view similar to FIG. 1 in an engaged position with an intermediate couple transmitted from the engine
  • FIG. 3 is a view similar to FIGS. 1 and 2, in a disengaged position of the friction clutch
  • FIG. 4 is a fragmentary perspective view of a transmission housing according to the invention in an at least partially exploded position of the constituent elements;
  • FIG. 5 is a fragmentary perspective view of a transmission in an exploded position of its constituent elements
  • FIGS. 6 to 8 show cross-sectional views of a transmission in variable positions of clutching, FIG. 6 corresponding to an unclutched position, FIG. 8 corresponding to a fully engaged position.
  • the transmission extends between a motor member, such as the drive shaft of the engine, generally the cutting blade carrier of the engine when the engine is for example a lawnmower, and a drive shaft 1 for the engine, such as the drive shaft 1 of the engine, such as the wheel drive shaft.
  • a motor member such as the drive shaft of the engine
  • the cutting blade carrier of the engine when the engine is for example a lawnmower
  • a drive shaft 1 for the engine such as the drive shaft 1 of the engine, such as the wheel drive shaft.
  • Such a transmission is adapted to be inserted in a tractor automotive engine with an accompanying driver walking behind the engine. These engines are generally called pushed engines. The driver acts in this case on the steering member 12 for the engine, such as handlebars.
  • This transmission comprises, in a housing 2 , generally of synthetic material, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element 5 A, 5 B carried by the drive output shaft and kinematically secured in rotation with this latter.
  • the rotatable driving element 3 of the transmission is constituted by a tangent wheel in engagement with an endless drive screw 4 , the tangent wheel being adapted to be secured as desired to the output drive shaft 1 by means of at least one driven element 5 B having the form of a cone mounted freely slidably and kinematically secured in rotation with the output drive shaft 1 , said cone 5 B being disposed within the axial bore of the tangent wheel to come, in the course of its controlled movement, into engagement with a conical periphery 3 A of the tangent wheel.
  • the clutch comprises two driven element each having the shape of a cone. The driving element 3 and driven element 5 A, 5 B come into bearing contact with variable grip so as to obtain a variation of the couple transmitted to the drive output shaft 1 of the wheels under the action of a control device projecting at least partially from the housing 2 .
  • control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine tending to bring the driving element 3 and the driven element 5 A, 5 B into engagement to increase the couple transmitted when the resistance to advancement of the engine increases, the other, generated by the weight of the engine that is relieved by the driver, tending to uncouple the driving element 3 and driven element 5 A, 5 B to reduce the couple transmitted when the resistance to advance of the engine decreases.
  • this control device is constituted by a first control member 6 A, 6 B movable angularly at least within the transmission housing 2 to ensure the gripping or the release of the driving element 3 and the driven element 5 A, 5 B, this first member 6 A, 6 B being connected by a movement transmission to a second member 7 A positioned immediately adjacent or on the engine drive member 12 , this second member 7 A receiving the inertial force of the driver of the engine or of the engine itself.
  • the second member is constituted by a lever 7 A pivotally connected to said first member 6 A, 6 B by means of a transmission member, such as a cable 13 .
  • This second member can again be constituted by a handle sliding along the chassis of the engine.
  • this first control member 6 A, 6 B has the form of an elbowed lever of which one arm constitutes a fork 6 A movable angularly within the housing 2 by means of the other arm 6 B outside the housing, this other arm, spring loaded in the direction of uncoupling of the driving and driven element, being subjected to the action of a second member 7 A of the control device.
  • the friction clutching is also used as a speed changer, there is a very rapid heating of the interior of the housing.
  • stop means 8 , 9 disposed on said shaft 1 on opposite sides of the driven rotatable element or elements to constitute axial abutments defining an interval of a maximum fixed length adapted to absorb the forces applied by means of the control device on the driven element and on the driven element of the clutch in the clutching phase and thus to shield the housing 2 carrying the output drive shaft from any force thanks to a field of application of the forces in a closed circuit.
  • At least one means 9 of the stop means 8 , 9 is constituted by a ring mounted fixedly in translation on the shaft by means of a connection member such as a pin 9 A, the other stop means being constituted by a cone 5 A mounted fixedly in translation and kinematically secured in rotation to the output drive shaft 1 .
  • This cone 5 A is adapted to be disposed within an axial bore of the driving element 3 having the shape of a toothed wheel tangent to the controlled path of movement of the driven element 5 B axially movable on the shaft 1 to come into engagement with a conical periphery 3 A of the tangent wheel 3 .
  • the first control member of the control device constituted by the fork-lever assembly is thus disposed between said stop means 8 , 9 and thus constitutes a spacer disposed in the interval defined by said stop means 8 , 9 as shown in FIGS. 4 to 6 .
  • This spacer is disposed between the axially free driven element 5 B and the stop means 9 constituted by the ring.
  • rolling members 10 A, 10 B, flanges 11 A, 11 B and crosspiece 15 In this interval between the axially free driven element 5 B and the stop means 9 , in addition to the spacer, there are rolling members 10 A, 10 B, flanges 11 A, 11 B and crosspiece 15 .
  • a rolling member 10 A, 10 B whose active surface adapted to come into contact with the spacer is covered by a hollowed flange 11 A, 11 B.
  • a crosspiece 15 is also provided, between the axially movable driven element 5 B and one of the rollers 10 A, a crosspiece 15 .
  • stop means 8 , 9 disposed on opposite sides of the rotatable driven element 5 B mounted freely axially on the shaft such that one of the stop means, in particular the stop means 8 , will be constituted by one of the cones 5 A of the friction clutching device, permits obtaining a low cost assembly.
  • the lateral walls of the housing are absolutely not stressed during engagement or disengagement of the cones.

Abstract

The invention relates to a transmission between a drive member and a drive shaft (1) of an automotive engine of the type comprising, in a housing (2), a friction clutch constituted by at least one rotatable driving element (3) and at least one driven element coming into bearing contact with variable gripping to obtain a variation of the couple transmitted to the output shaft (1) under the action of a control device that at least partially projects from the housing (2).
This transmission is characterized in that the control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine, tending to bring together the drive element (3) and the driven element when the resistance to forward movement of the engine increases, the other, generated by the mass of the engine tending to uncouple the drive element (3) and driven element when the resistance to advance of the engine decreases.

Description

  • The present invention relates to a transmission between a motor member and a drive shaft of an automotive tractor engine with an accompanying driver walking behind the engine, this driver acting on the steering member of the engine, such as a handlebar, as well as a driving engine provided with such a transmission. [0001]
  • It relates more particularly to a transmission of the type comprising, in a housing, a friction clutch constituted by at least one rotating drive element and at least one driven element carried by the drive output shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with variable engagement to obtain a variation of the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device projecting at least partially from the housing. [0002]
  • Transmissions of the mentioned type are well known to those skilled in this art. Generally, the control devices coupled to the friction clutch do not permit using the function of varying the speed of clutching. [0003]
  • An object of the present invention is to provide a transmission of the mentioned type whose design permits incorporating a control device permitting a variation of speed of the engine whilst permitting the driver to control automatically the speed of the engine by automatically controlling the speed change arising from terrain of varied profile such as rising and falling. [0004]
  • Another object of the present invention is to provide a transmission of simple design at a reasonable cost. [0005]
  • To this end, the invention has for its object a transmission between a drive member and a drive shaft of an automotive tractor engine with a driver walking behind the engine, this driver acting on a steering member for the engine, such as handlebars, the transmission comprising, in a housing, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element carried by the output drive shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with a variable grip to obtain a variation in the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device that at least partially projects from the housing, characterized in that the control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine, tending to bring together the driving and driven element to increase the couple transmitted when the resistance to forward movement of the engine increases, the other, generated by the mass of the engine relieved by the driver, tending to uncouple the driving and driven element to reduce the couple transmitted when the resistance to advance of the engine decreases. [0006]
  • The invention also has for its object a driven tractor engine with an accompanying driver, the driver walking behind the engine acting on a steering member for the engine such as handlebars, this driving engine incorporating between a motor member and a drive shaft a transmission, the transmission comprising, in a housing, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element carried by the drive output shaft and kinematically secured in rotation with this latter, these driving and driven element coming into bearing contact with a variable grip to obtain the variation of the couple transmitted to the output drive shaft, such as a wheel drive shaft, under the action of a control device at least partially projecting from the housing, characterized in that the transmission is of the mentioned type.[0007]
  • The invention will be better understood from a reading of the following description of examples of embodiment, with reference to the accompanying drawings, in which: [0008]
  • FIG. 1 is a side view of a transmission according to the invention in an engaged position corresponding to a maximum transmitted couple of the engine; [0009]
  • FIG. 2 shows a view similar to FIG. 1 in an engaged position with an intermediate couple transmitted from the engine; [0010]
  • FIG. 3 is a view similar to FIGS. 1 and 2, in a disengaged position of the friction clutch; [0011]
  • FIG. 4 is a fragmentary perspective view of a transmission housing according to the invention in an at least partially exploded position of the constituent elements; [0012]
  • FIG. 5 is a fragmentary perspective view of a transmission in an exploded position of its constituent elements, and [0013]
  • FIGS. [0014] 6 to 8 show cross-sectional views of a transmission in variable positions of clutching, FIG. 6 corresponding to an unclutched position, FIG. 8 corresponding to a fully engaged position.
  • As mentioned above, the transmission, according to the invention, extends between a motor member, such as the drive shaft of the engine, generally the cutting blade carrier of the engine when the engine is for example a lawnmower, and a [0015] drive shaft 1 for the engine, such as the drive shaft 1 of the engine, such as the wheel drive shaft.
  • Such a transmission is adapted to be inserted in a tractor automotive engine with an accompanying driver walking behind the engine. These engines are generally called pushed engines. The driver acts in this case on the [0016] steering member 12 for the engine, such as handlebars. This transmission comprises, in a housing 2, generally of synthetic material, a friction clutch of the type constituted by at least one rotatable driving element and at least one driven element 5A, 5B carried by the drive output shaft and kinematically secured in rotation with this latter. In the illustrated examples, the rotatable driving element 3 of the transmission is constituted by a tangent wheel in engagement with an endless drive screw 4, the tangent wheel being adapted to be secured as desired to the output drive shaft 1 by means of at least one driven element 5B having the form of a cone mounted freely slidably and kinematically secured in rotation with the output drive shaft 1, said cone 5B being disposed within the axial bore of the tangent wheel to come, in the course of its controlled movement, into engagement with a conical periphery 3A of the tangent wheel. In the example shown in the figures, the clutch comprises two driven element each having the shape of a cone. The driving element 3 and driven element 5A, 5B come into bearing contact with variable grip so as to obtain a variation of the couple transmitted to the drive output shaft 1 of the wheels under the action of a control device projecting at least partially from the housing 2.
  • In a manner characteristic of the invention, the control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine tending to bring the [0017] driving element 3 and the driven element 5A, 5B into engagement to increase the couple transmitted when the resistance to advancement of the engine increases, the other, generated by the weight of the engine that is relieved by the driver, tending to uncouple the driving element 3 and driven element 5A, 5B to reduce the couple transmitted when the resistance to advance of the engine decreases.
  • Generally speaking, this control device is constituted by a [0018] first control member 6A, 6B movable angularly at least within the transmission housing 2 to ensure the gripping or the release of the driving element 3 and the driven element 5A, 5B, this first member 6A, 6B being connected by a movement transmission to a second member 7A positioned immediately adjacent or on the engine drive member 12, this second member 7A receiving the inertial force of the driver of the engine or of the engine itself. In the example illustrated in FIGS. 1 to 3, the second member is constituted by a lever 7A pivotally connected to said first member 6A, 6B by means of a transmission member, such as a cable 13. This second member can again be constituted by a handle sliding along the chassis of the engine.
  • As shown in FIGS. [0019] 4 to 6, this first control member 6A, 6B has the form of an elbowed lever of which one arm constitutes a fork 6A movable angularly within the housing 2 by means of the other arm 6B outside the housing, this other arm, spring loaded in the direction of uncoupling of the driving and driven element, being subjected to the action of a second member 7A of the control device.
  • Because the friction clutching is also used as a speed changer, there is a very rapid heating of the interior of the housing. To avoid undesirable consequences of this heating, there is provided, on the shaft clutch and on the [0020] drive output shaft 1 carrying the driving element 3 or at least one driven element 5B mounted freely slidably on the shaft 1, stop means 8, 9 disposed on said shaft 1 on opposite sides of the driven rotatable element or elements to constitute axial abutments defining an interval of a maximum fixed length adapted to absorb the forces applied by means of the control device on the driven element and on the driven element of the clutch in the clutching phase and thus to shield the housing 2 carrying the output drive shaft from any force thanks to a field of application of the forces in a closed circuit.
  • In the illustrated examples, at least one means [0021] 9 of the stop means 8, 9 is constituted by a ring mounted fixedly in translation on the shaft by means of a connection member such as a pin 9A, the other stop means being constituted by a cone 5A mounted fixedly in translation and kinematically secured in rotation to the output drive shaft 1. This cone 5A is adapted to be disposed within an axial bore of the driving element 3 having the shape of a toothed wheel tangent to the controlled path of movement of the driven element 5B axially movable on the shaft 1 to come into engagement with a conical periphery 3A of the tangent wheel 3.
  • The first control member of the control device constituted by the fork-lever assembly is thus disposed between said [0022] stop means 8, 9 and thus constitutes a spacer disposed in the interval defined by said stop means 8, 9 as shown in FIGS. 4 to 6. This spacer is disposed between the axially free driven element 5B and the stop means 9 constituted by the ring. In this interval between the axially free driven element 5B and the stop means 9, in addition to the spacer, there are rolling members 10A, 10B, flanges 11A, 11B and crosspiece 15. Thus, there is provided on either side of the spacer, a rolling member 10A, 10B whose active surface adapted to come into contact with the spacer is covered by a hollowed flange 11A, 11B. There is also provided, between the axially movable driven element 5B and one of the rollers 10A, a crosspiece 15. The use of stop means 8, 9, disposed on opposite sides of the rotatable driven element 5B mounted freely axially on the shaft such that one of the stop means, in particular the stop means 8, will be constituted by one of the cones 5A of the friction clutching device, permits obtaining a low cost assembly. Moreover, thanks to this technical arrangement, the lateral walls of the housing are absolutely not stressed during engagement or disengagement of the cones.
  • The operation of such a transmission is particularly easy. When the driver walks behind the engine and acts on the [0023] member 7A of the control device, he can, as desired, by means of the cable 13 acting on the control member 6A, 6B, effect gripping or ungripping, which is to say approach or spacing apart of the cones relative to the conical peripheries 3A of the tangent wheel 3. When the terrain over which the engine moves is sloped, the engine naturally tends, under the influence of its own weight, to advance more quickly than the driver if the driver maintains his pace. Because of this, there results a movement of the member 7A in a direction ensuring disengagement of the driven element 5A, 5B relative to the driving element 3 and accordingly a reduction of the couple transmitted, such that, naturally, the engine adapts to the pace of the driver whilst taking into consideration the variations of the terrain. Conversely, if the terrain on which the engine moves rises, the driver tends naturally to move the first member 7A of the control device to the right in FIG. 1 and to effect gripping of the driven element 5A, 5 within the driving element 3. As a result, there is an increase of the couple transmitted such that the driver can maintain his pace even though the engine is following a rising path. Such a transmission hence has the advantage of permitting the driver automatically to control the speed of movement of the engine by adapting it to variations of the terrain without this transmission generating any heating within the transmission housing.

Claims (11)

1. Transmission between a drive member and a drive shaft (1) of an automotive tractor engine with an accompanying driver walking behind the engine, this driver acting on a member (12) connected to the engine, such as handlebars, the transmission comprising, in a housing (2), a friction clutch of the type constituting at least one rotatable driving element (3) and at least one drive element (5A, 5B) carried by the output drive shaft (1) and kinematically connected in rotation to this latter, this driving element (3) and driven element (5A, 5B) coming into bearing contact with variable gripping to obtain a variation of the couple transmitted to the drive output shaft (1) such as a drive shaft for wheels, under the action of a control device that at least partially projects from the housing (2),
characterized in that the control device is automatically actuated by two separate inertial forces, one generated by the driver of the engine tending to bring together the driving element (3) and the driven element (5A, 5B) to increase the couple transmitted when the resistance to advance of the engine increases, the other generated by the mass of the engine relieved by the driver, tending to uncouple the drive element (3) and the driven element (5A, 5B) to reduce the couple transmitted when resistance to forward movement of the engine decreases.
2. Transmission according to claim 1,
characterized in that the control device is constituted by a first member (6A, 6B) angularly displaceable at least within the interior of the transmission housing (2) to ensure the gripping or ungripping of the drive element (3) and the driven element (5A, 5B), this first member (6A, 6B) being connected by a movement transmission to a second member (7A) located immediately adjacent or on the drive member (12) of the engine, this second member (7A) receiving the inertial force of the driver of the engine or of the engine itself.
3. Transmission according to claim 2,
characterized in that the second member is constituted by a pivoting lever (7A) connected to said first member (6A, 6B) by means of a transmission member, such as a cable (13).
4. Transmission according to one of claims 1 to 3,
characterized in that it is provided, on the drive output shaft (1) that carries the driving element (3), with at least one driven element (5B) freely slidably mounted on the shaft (1), stop means (8, 9) disposed on said shaft (1) on opposite sides of the rotatable driven element to constitute axial abutments defining an interval of a maximum fixed length adapted to contain the forces applied by means of the control device to the driven element or to the driven element of the clutch in the clutching phase and thereby to shield the housing (2) that carries the output drive shaft (1) from any force thanks to a field of application of forces in a closed circuit.
5. Transmission according to claim 4,
characterized in that the control device is constituted by a first control member (6A, 6B) movable angularly at least within the interior of the transmission housing to ensure gripping or ungripping of the driving element (3) and driven element (5A, 5B), this first control member (6A, 6B) being constituted by at least one spacer disposed in the interval defined by said stop means (8, 9) between the axially free driven element (5B) and a stop means (9).
6. Transmission according to claim 5, characterized in that it is provided, on opposite sides of the spacer, with a rolling member (10A, 10B) whose active surface adapted to come into contact with the spacer is covered by a hollowed flange (11A, 11B).
7. Transmission according to claim 6, characterized in that it is provided, between the axially movable driven element (5B) and one of the rolling members (10A), with a cross member (15).
8. Transmission according to one of claims 2 and 5, characterized in that the first control member (6A, 6B) has the shape of an elbowed lever of which one arm constitutes a fork (6A) angularly movable within the interior of the housing (2) by means of the other arm (6B) outside the housing, this other arm, loaded by a spring in the direction of ungripping of the driving and driven elements, being subjected to the action of a second member (7A) of the control device.
9. Transmission according to claim 4,
characterized in that at least one (9) of the stop means (8, 9) is constituted by a ring fixedly mounted in translation on the shaft by means of a connection member such as a pin (9A), the other stop means being constituted by a cone (5A) being mounted fixedly in translation and kinematically secured in rotation to the output drive shaft (1), this cone (5A) being adapted to be disposed within an axial bore of the driving element (3) having the shape of a toothed wheel tangent to the path of movement controlled by the driven element (5B) axially movable on the shaft (1) to come into engagement with the conical periphery (3A) of the tangent wheel (3).
10. Transmission according to one of claims 1 to 9,
characterized in that the rotatable driving element (3) of the transmission is constituted by a wheel tangent in engagement with an endless drive screw (4), the tangent wheel being adapted to be secured as desired to the output drive shaft (1) by means of at least one driven element (5) having the shape of a cone mounted freely slidably and kinematically secured in rotation with the output drive shaft (1), said cone (5B) being disposed within the axial bore of the tangent wheel to come, in the course of its controlled movement, into engagement with a conical periphery (3A) of the tangent wheel.
11. Tractor driving engine with an accompanying driver, the driver walking behind the engine acting on a member (12) for steering the engine such as handlebars, this drive engine incorporating, between a drive member and a drive shaft, a transmission, the transmission comprising, in a housing (2), a friction clutch of the type constituted by at least one rotatable driving member (3) and at least one driven member carried by the output drive shaft (1) and kinematically secured in rotation to this latter, these driving element (3) and driven element (5A, 5B) coming into bearing contact with variable grip to obtain a variation of the couple transmitted by the output drive shaft (1), such as a drive shaft of wheels, under the influence of a control device that projects at least partially from the housing (2),
characterized in that the transmission is according to one of claims 1 to 10.
US10/229,071 2001-08-29 2002-08-28 Transmission between a motor member and a drive shaft and engine motor provided with such a transmission Expired - Lifetime US6789441B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0111203A FR2829091B1 (en) 2001-08-29 2001-08-29 TRANSMISSION BETWEEN A MOTOR COMPONENT AND A DRIVE SHAFT AND MOTOR VEHICLE EQUIPPED WITH SUCH A TRANSMISSION
FR0111203 2001-08-29

Publications (2)

Publication Number Publication Date
US20030045398A1 true US20030045398A1 (en) 2003-03-06
US6789441B2 US6789441B2 (en) 2004-09-14

Family

ID=8866794

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/229,071 Expired - Lifetime US6789441B2 (en) 2001-08-29 2002-08-28 Transmission between a motor member and a drive shaft and engine motor provided with such a transmission

Country Status (2)

Country Link
US (1) US6789441B2 (en)
FR (1) FR2829091B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030006074A1 (en) * 2001-05-23 2003-01-09 Tomoaki Ishikawa Walk-behind working machine
US20050098406A1 (en) * 2002-04-30 2005-05-12 France Reducteurs S.A. Cone clutch mechanism
DE102012203029A1 (en) * 2012-02-28 2013-08-29 Sabo - Maschinenfabrik Gmbh clutch assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070214762A1 (en) * 2004-07-30 2007-09-20 Hydro-Gear Limited Partnership Walk behind sliding gear clutch
US7175012B2 (en) * 2004-09-23 2007-02-13 Mtd Products Inc Transmission for a walk-behind lawn mower
FR2917797B1 (en) 2007-06-20 2009-08-28 France Reducteurs Soc Par Acti TRANSMISSION BETWEEN AN ENGINE AND WHEELS AND EQUIPMENT COMPRISING SUCH A TRANSMISSION
US10746279B2 (en) * 2015-05-19 2020-08-18 France Reducteurs Transmission gear box and method of closing same and vehicle equipped with such a transmission gear box
WO2018015633A1 (en) 2016-07-21 2018-01-25 France Reducteurs Transmission housing, and vehicle comprising a housing of said type
US10605314B2 (en) 2018-03-30 2020-03-31 Honda Motor Co., Ltd. Transmission for wheeled machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117652A (en) * 1976-09-30 1978-10-03 The J. B. Foote Foundry Co. Transmission for self-propelled, walking lawn mowers
US4307795A (en) * 1980-03-10 1981-12-29 The J. B. Foote Foundry Co. Cam shift mechanism
US4835949A (en) * 1983-05-02 1989-06-06 Outboard Marine Corporation Operator presence control for self-propelled implements
US4841794A (en) * 1987-06-10 1989-06-27 Kanzaki Kokyukoki Mfg. Co., Ltd. Transmission for self-propelled walking mowers
US4858739A (en) * 1987-09-30 1989-08-22 Kanzaki Kokyukoki Mfg. Co., Ltd. Clutch and brake assembly for working vehicles
US4907401A (en) * 1988-06-24 1990-03-13 Kanzaki Kokyukoki Mfg. Co., Ltd. Drive assembly for walking mowers
US5850758A (en) * 1997-02-14 1998-12-22 Kanzaki Kokyukoki Mfg., Co., Ltd. Transmission for self-propelled walking lawn mowers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147818A (en) * 1962-06-08 1964-09-08 Rotary Hoes Ltd Reverse-drive safety device for a walktype tractor or cultivator
GB1464658A (en) * 1975-03-06 1977-02-16 Post Office Pedestrian controlled vehicles
FR2660977A2 (en) * 1989-03-02 1991-10-18 Blanchard Robert Improvements to coupling reduction gears
JP3976430B2 (en) * 1998-12-09 2007-09-19 本田技研工業株式会社 Power transmission device for work equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117652A (en) * 1976-09-30 1978-10-03 The J. B. Foote Foundry Co. Transmission for self-propelled, walking lawn mowers
US4307795A (en) * 1980-03-10 1981-12-29 The J. B. Foote Foundry Co. Cam shift mechanism
US4835949A (en) * 1983-05-02 1989-06-06 Outboard Marine Corporation Operator presence control for self-propelled implements
US4841794A (en) * 1987-06-10 1989-06-27 Kanzaki Kokyukoki Mfg. Co., Ltd. Transmission for self-propelled walking mowers
US4858739A (en) * 1987-09-30 1989-08-22 Kanzaki Kokyukoki Mfg. Co., Ltd. Clutch and brake assembly for working vehicles
US4907401A (en) * 1988-06-24 1990-03-13 Kanzaki Kokyukoki Mfg. Co., Ltd. Drive assembly for walking mowers
US5850758A (en) * 1997-02-14 1998-12-22 Kanzaki Kokyukoki Mfg., Co., Ltd. Transmission for self-propelled walking lawn mowers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030006074A1 (en) * 2001-05-23 2003-01-09 Tomoaki Ishikawa Walk-behind working machine
US6848523B2 (en) * 2001-05-23 2005-02-01 Honda Giken Kogyo Kabushiki Kaisha Walk-behind working machine
US20050098406A1 (en) * 2002-04-30 2005-05-12 France Reducteurs S.A. Cone clutch mechanism
US7004298B2 (en) * 2002-04-30 2006-02-28 France Reducteurs S.A. Cone clutch mechanism
DE102012203029A1 (en) * 2012-02-28 2013-08-29 Sabo - Maschinenfabrik Gmbh clutch assembly

Also Published As

Publication number Publication date
FR2829091A1 (en) 2003-03-07
US6789441B2 (en) 2004-09-14
FR2829091B1 (en) 2003-11-28

Similar Documents

Publication Publication Date Title
KR100553787B1 (en) Actuator for clutch ring
EP0795460B1 (en) Hub bicycle transmission
US6789441B2 (en) Transmission between a motor member and a drive shaft and engine motor provided with such a transmission
CA2095663A1 (en) Variable speed drive system
EP1865237B1 (en) Park-position mechanism
EP1767831A1 (en) Shift control device for saddle-riding-type vehicle, and saddle-riding-type vehicle
US5515957A (en) Uni-directional transmission with positive engagement and disengagement features
US9456546B2 (en) Transmission device for self-propelled equipment and self-propelled equipment fitted with such a transmission
EP1258185A1 (en) Self-propelled walk-behind implement and trasaxle therefor
US5012907A (en) Transmission for separately drivable right and left wheels
EP2602513B1 (en) Belt type continuously variable transmission
US4798259A (en) Front wheel speed-up mechanism for a four wheel drive vehicle when turning
US6681909B2 (en) Walk-behind implement having wrap spring wheel clutches
US5301571A (en) Automatic speed gear for bicycles
EP1700780B1 (en) Internal hub transmission with a coaster brake for a go-cart
CA1098059A (en) Automatic clutch
CA1069837A (en) Small transmission with brake
JP3399026B2 (en) Transmission operating device for traveling transmission
JPH0542574B2 (en)
JPH0722516Y2 (en) Locking device for V-belt type automatic transmission
JPH071538Y2 (en) Self-propelled walk-behind work vehicle transaxle
JPH0356650Y2 (en)
JPH0749115Y2 (en) Forward / backward switching device for mobile agricultural machinery
JPH0318305Y2 (en)
JPH0232920Y2 (en)

Legal Events

Date Code Title Description
AS Assignment

Owner name: FRANCE REDUCTEURS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLANCHARD, ROBERT;REEL/FRAME:013237/0993

Effective date: 20020821

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12